Buggy code:
public class Shell extends Decorations { int shellHandle ; int focusProxy ; boolean reparented ; boolean realized ; boolean moved ; boolean resized ; boolean opened ; int oldX ; int oldY ; int oldWidth ; int oldHeight ; Control lastActive ; Region region ; static final int MAXIMUM_TRIM = 128 ; static final byte [ ] WM_DELETE_WINDOW = Converter . wcsToMbcs ( null , "WM_DELETE_WINDOW" ) ; static final byte [ ] _NET_WM_STATE = Converter . wcsToMbcs ( null , "_NET_WM_STATE" ) ; static final byte [ ] _NET_WM_STATE_MAXIMIZED_VERT = Converter . wcsToMbcs ( null , "_NET_WM_STATE_MAXIMIZED_VERT" ) ; static final byte [ ] _NET_WM_STATE_MAXIMIZED_HORZ = Converter . wcsToMbcs ( null , "_NET_WM_STATE_MAXIMIZED_HORZ" ) ; public Shell ( ) { } public Shell ( int style ) { } public Shell ( Display display ) { } public Shell ( Display display , int style ) { } Shell ( Display display , Shell parent , int style , int handle ) { } public Shell ( Shell parent ) { } public Shell ( Shell parent , int style ) { } static int checkStyle ( int style ) { } public static Shell motif_new ( Display display , int handle ) { } public void addShellListener ( ShellListener listener ) { } void adjustTrim ( ) { } int borderHandle ( ) { } void bringToTop ( boolean force ) { } void checkOpen ( ) { } public void close ( ) { } void closeWidget ( ) { } public Rectangle computeTrim ( int x , int y , int width , int height ) { } void createFocusProxy ( ) { } void createHandle ( int index ) { <START_BUG> state |= ( HANDLE ) | ( CANVAS ) ; <END_BUG> int decorations = 0 ; if ( ( ( style ) & ( SWT . NO_TRIM ) ) == 0 ) { if ( ( ( style ) & ( SWT . MIN ) ) != 0 ) decorations |= OS . MWM_DECOR_MINIMIZE ; if ( ( ( style ) & ( SWT . MAX ) ) != 0 ) decorations |= OS . MWM_DECOR_MAXIMIZE ; if ( ( ( style ) & ( SWT . RESIZE ) ) != 0 ) decorations |= OS . MWM_DECOR_RESIZEH ; if ( ( ( style ) & ( SWT . BORDER ) ) != 0 ) decorations |= OS . MWM_DECOR_BORDER ; if ( ( ( style ) & ( SWT . MENU ) ) != 0 ) decorations |= OS . MWM_DECOR_MENU ; if ( ( ( style ) & ( SWT . TITLE ) ) != 0 ) decorations |= OS . MWM_DECOR_TITLE ; if ( ( ( style ) & ( SWT . RESIZE ) ) != 0 ) decorations |= OS . MWM_DECOR_BORDER ; } int inputMode = OS . MWM_INPUT_MODELESS ; if ( ( ( style ) & ( SWT . PRIMARY_MODAL ) ) != 0 ) inputMode = OS . MWM_INPUT_PRIMARY_APPLICATION_MODAL ; if ( ( ( style ) & ( SWT . APPLICATION_MODAL ) ) != 0 ) inputMode = OS . MWM_INPUT_FULL_APPLICATION_MODAL ; if ( ( ( style ) & ( SWT . SYSTEM_MODAL ) ) != 0 ) inputMode = OS . MWM_INPUT_SYSTEM_MODAL ; byte [ ] buffer = new byte [ ] { ( ( byte ) ( '<seq2seq4repair_space>' ) ) , 0 , 0 , 0 } ; int ptr = OS . XtMalloc ( buffer . length ) ; OS . memmove ( ptr , buffer , buffer . length ) ; int [ ] argList1 = new int [ ] { OS . XmNmwmInputMode , inputMode , OS . XmNmwmDecorations , decorations , OS . XmNoverrideRedirect , ( ( style ) & ( SWT . ON_TOP ) ) != 0 ? 1 : 0 , OS . XmNtitle , ptr } ; int orientations = ( SWT . LEFT_TO_RIGHT ) | ( SWT . RIGHT_TO_LEFT ) ; if ( ( ( ( style ) & ( ~ orientations ) ) == ( SWT . NONE ) ) || ( ( ( style ) & ( ( SWT . NO_TRIM ) | ( SWT . ON_TOP ) ) ) != 0 ) ) { reparented = true ; } byte [ ] appClass = display . appClass ; if ( ( ( ( parent ) == null ) && ( ( ( style ) & ( SWT . ON_TOP ) ) == 0 ) ) && ( inputMode != ( OS . MWM_INPUT_FULL_APPLICATION_MODAL ) ) ) { int xDisplay = display . xDisplay ; int widgetClass = OS . applicationShellWidgetClass ( ) ; shellHandle = OS . XtAppCreateShell ( appName , appClass , widgetClass , xDisplay , argList1 , ( ( argList1 . length ) // 2 ) ) ; } else { int widgetClass = OS . transientShellWidgetClass ( ) ; int parentHandle = display . shellHandle ; if ( ( parent ) != null ) parentHandle = parent . handle ; shellHandle = OS . XtCreatePopupShell ( appClass , widgetClass , parentHandle , argList1 , ( ( argList1 . length ) // 2 ) ) ; } OS . XtFree ( ptr ) ; if ( ( shellHandle ) == 0 ) error ( ERROR_NO_HANDLES ) ; if ( ( handle ) != 0 ) { OS . XtSetMappedWhenManaged ( shellHandle , false ) ; OS . XtRealizeWidget ( shellHandle ) ; OS . XtSetMappedWhenManaged ( shellHandle , true ) ; int xDisplay = display . xDisplay ; int xWindow = OS . XtWindow ( shellHandle ) ; if ( xWindow == 0 ) error ( ERROR_NO_HANDLES ) ; OS . XReparentWindow ( xDisplay , xWindow , handle , 0 , 0 ) ; handle = 0 ; } createHandle ( index , shellHandle , true ) ;

Fix:
state |= CANVAS ;